Locking device for hoisting apparatus.



W. RUTAN. LGCKING DEVICE FOR HOIYSTING APPARATUS. APPLICATION FILED APR.28. 1915.

1,163,176. Patented Dec. 7, 1915.

I a STATES a nare.

WILLIAM nucraiv, on NEW YORK, Y., ASSIGNOB 'ro GILLIs & GEOGHEGAN, onNEW YORK, n. Y., Armin,

' LOCKING DEVICE FOR HOISTING APPARATUS.

1,024,885, in which the hoisting-head is mounted to swing horizontallyupon its standard, and the object of the invention is to provide asimple, efficient, easily operi of this specification and show theinvention ated device for automatically lockingthe hoisting-head to thestandard during the hoisting operation, and which shall extend outwardlybut slightly and thus avoid the danger of fracture or derangement due tothe rough handling to which heavy machinery of this class is subjectedin transporte tion.

of construction and arrangement bywhich the above objects are attained,to be hereinafter described and claimed.

The accompanying drawings form a part as it has been carried out inpractice.

Figure 1 is an elevation of the upper portion of the hoisting apparatus,equipped with the improved locking device. The succeeding figuresare ona larger scale and show the lock orlatch with so much of the adjacentportions of the hoisting-head and standard as are necessary to show itsrelation thereto. Fig. 2 is an elevation as seenv from the left inFig. 1. Fig. 3 is a vertical section, partly in elevation, the plane ofsection being indicated by the lineo3-3 in Fig. 2. Fig. dis a horizontalsection taken on the line 41 in Fig. :2, and partly in plan view.

Similar letters of reference indicate th same parts in all the figures.

A is a tubular standard arranged to slide telescopically in a verticalhollow post, not shown, and to be raised or lowered by suitablemechanism on such post, arranged to engage a rack A on the standard, orotherwise. At the upper end of the latter is the hoisting-head equippedwith arms B B in Specification of Letters Patent.

Application filed A ril 28, 1915. Serial No. 24,425.

The invention consists in certain details Patented Dec. *7, 1915.

. which is journaled a shaft Coperatedbya crank C and carrying a pinionC in mesh with the gear wheel I) on a shaft D mounted in the arms 33Bparallel with the shaft C, and carrying a winding-drum D on which iswound the cable M by which the load M is lifted by turning the crank CThe hoist ing-head may be understood to be supplied with a brake andother necessary equipments. The hoistinghead is rotatably mounted on thestandard so that it may be swung as required, and it is important thatit remain fixed relatively to the standard while the crank is beingturned in raising or lowering the load. F I v i B is a cylindrical shaftor stud firmly fixed in theboss B in the upper, end of the tubularstandard with liberty to rotate therein, the head be ing supported on anantifriction hearing or step as at B to facilitate such rotation andpermit the head to be swung when desired. In thestud B is a radialcavity 6 containing a cylindricallatchF urged outwardly radially to thestud by a he'lical'spring G in the-cavity, and held against escapetherefrom by the engagement of a shoulderF on the latch with an internalflange or lip 6 formed by peening over the'metal of the stud along themargin of the cavity after the insertion of the spring andlatch.

The nose F of the latch is of less diameter of the head and receivedthanthe body, thus forming a shoulder F and is rounded on its" end orouterface, In the locked position the nose F enters and engages in ahole a drilled radially in the standard in the properlocation toregister with the cavity 5 and insurev the desired position of thehoisting-head when thus protuberance or circular boss on the exterior ofthe standard. The push-pin J is held loosely in place by the engagementof a flange thereon, marked J with an annular internal flange Hsurrounding the opening in the housing, and has a rounded projection Jon the inner face arranged to be presented to and abut axially againstthe nose F and force the latter inwardly by pressure of the hand appliedupon the protruding portion vof the push-pin when the stud and standardare locked and it is desired to release them. The projection J is soshaped and proportioned as to enter the hole a as the latch is forcedinwardly and bring the line oi contact between the projection and noseinto coincidence with the circumferential line of separation or jointbetween the stud B and interior surface of the standard A. While thusconditioned the hoistinghead with its stud may be rotated within thestandard, the nose F of the latch riding idly in rubbing contact withthe inner surface of the standard. By turning the head again to thelocking position, the nose F automatically enters the hole a whenpresented thereto, forcing the push-pin outwardly and again locks thehead in the hoisting position. The locking means is strong and reliableand adapted to resist the rough usage to which apparatus ofthe characteris peculiarly liable, and as the housing and push-pin project butslightly,

the apparatus may be shipped with the lock attached and in place readyfor service, with- .out danger of damage in transportation.

The, latch also aids in securing the head to the standard when lockedthereto.

I claim 1, In a hoisting apparatus, a tubular standard, a hoisting-headmount-ed toswing thereon and having a stud received therein, said studhaving a radial cavity, and said standard having a radial hole locatedto register axially with such cavity whenpresented thereto by therotation of said stud, an axially movable latch in such cavity, a springin the latter arranged to-urge said latch outwardly into lockingengagement with such role and means on the exterior of said standard forforcing said latch inwardly in opposition to such spring and outofengagement with such hole.

2. In a, hoisting apparatus, a tubular standard, a hoisting-headmounted'to swing thereon and having a stud received therein, said studhaving a radial cavity, and said standard having a radial hole locatedto register axially with such cavity when presented thereto by therotation of said stud, an axially movable latch in such cavity, a springin the latter arrangedto urge said latch outwardly into lockingengagement with such hole, a housing secured to said standard on theexterior thereof and covering such hole, and a push-pin slidable insaid-housing, having an inward projection arranged to enter such holeand abut against said'latch and force it inwardly in opposi tion to saidspring and out of engagement with such hole.

3. In a hoisting apparatus, a tubular standard, a hoisting-head mountedto swing thereon and having a stud received therein, said stud having aradial cavity with the edge of the latter peened inwardly to form a lip,said standard having a radial hole located to register axially with suchcavity when presented thereto by the rotation of said stud, an axiallymovable latch in said cavity having a shoulder thereon adapted to engagesaid lip, and a nose adapted toenter and engage such hole, a spring insuch cavity arranged to urge said latch and nose into such engagement, ahousing secured to said standard on the exteriorthereof and coveringsuch hole, and a push-pin shdable 111 said housing, having an inwardprojection arranged to enter such hole and abut against said nose andforce it and its latch inwardly in opposition to said spring and out ofengagement with such hole.

1. In a hoisting apparatus, a tubular standard, a hoisting head mountedto swing thereon, said standard being mounted for vertical movement, astud received in the upper end of said standard with liberty to rotatetherein, said stud having a radial cavity and the standard having aradial opening, a radially movable latch in said cavity engageable insaid opening, a spring in the cavity of the stud forcing the latchoutward and a push pin movable inwardly against the outer end of saidlatch to force the latter inwardly'to disengage it from the opening inthe standard, and means within we ch said push pin is movable and bywhich it is prevented from outward displacement.

In testimony that I claim the invention above set forth I afiix mysignature, in presence of two witnesses. \VILLIAM RUTAN. Witnesses:CHARLES R. SEARLE,

Nronoms CoN'rr.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

